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Collagen quantitation by video-microdensitometry in rabbit atherosclerosis
R G Kratky1, J Ivey, M R Roach
1Department of Medical Biophysics, University of Western Ontario, London, Canada.
Summary
A new video-microdensitometry technique accurately quantifies collagen in tissue sections. This reliable method maps collagen distribution, proving useful for studying diseases like atherosclerosis.
Area of Science:
- Biomedical Engineering
- Histology
- Materials Science
Background:
- Accurate quantification of collagen mass fraction in tissues is crucial for understanding disease progression.
- Existing methods for collagen measurement can be time-consuming or require specialized equipment.
Purpose of the Study:
- To develop and validate a novel video-microdensitometry method for measuring collagen mass fraction in tissue sections.
- To create a detailed map of collagen distribution in atherosclerotic lesions using the developed method.
Main Methods:
- A video-microdensitometry system utilizing a frame grabber and computer was employed.
- Tissue sections were stained with picrosirius red, exploiting its stoichiometric binding to collagen.
- The method was calibrated for glutaraldehyde-fixed tissues.
Main Results:
- The video-microdensitometry method reliably measures collagen fraction at the pixel level.
- A detailed collagen distribution map was generated for a six-month rabbit atherosclerotic lesion.
- The technique demonstrated speed, ease of reproduction, and reliance on readily available equipment.
Conclusions:
- The developed video-microdensitometry method offers a reliable, fast, and reproducible approach for quantifying collagen in tissue sections.
- This technique facilitates detailed analysis of collagen distribution, particularly valuable in the study of atherosclerotic lesions.